Are these blobs? Can I get a feedback?

Not maintainer but yes these are blobs that represent Kopia's backup itself, for example I can see them when I open my onedrive to which Kopia is backing up:

Have you perhaps made a backup of a backup? Thus mounting the outer backup would still show you just all these blob files, not actual contents.

that indeed looks like a backup of an encrypted repository itself. If you backed up the repository instead of other files, it may or may not have useful data depending on how it was populated. Try restoring it to a new directory, then connect to that as a filesystem repository and see whether you have any files in it.

$ kopia repository connect filesystem --path=<path>
$ kopia snapshot list --all

Restored it to a new directory connected to it and then ran the kopia snapshot list --all and nothing appeared.

Prior to all this I had deleted all previous snapshot and then the idea was to create a new one and this is what I ended up with.